| # SPDX-License-Identifier: GPL-2.0-only |
| config SYSFS |
| bool "sysfs file system support" if EXPERT |
| default y |
| select KERNFS |
| help |
| The sysfs filesystem is a virtual filesystem that the kernel uses to |
| export internal kernel objects, their attributes, and their |
| relationships to one another. |
| |
| Users can use sysfs to ascertain useful information about the running |
| kernel, such as the devices the kernel has discovered on each bus and |
| which driver each is bound to. sysfs can also be used to tune devices |
| and other kernel subsystems. |
| |
| Some system agents rely on the information in sysfs to operate. |
| /sbin/hotplug uses device and object attributes in sysfs to assist in |
| delegating policy decisions, like persistently naming devices. |
| |
| sysfs is currently used by the block subsystem to mount the root |
| partition. If sysfs is disabled you must specify the boot device on |
| the kernel boot command line via its major and minor numbers. For |
| example, "root=03:01" for /dev/hda1. |
| |
| Designers of embedded systems may wish to say N here to conserve space. |
